Engraving depicting the arrangement of lenses in Johannes Kepler's telescope. This had two double convex lenses and gave a wider field of view. Johannes Kepler (1571-1630) a German mathematician, astronomer, and astrologer.
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SOLVED: 5.*A Keplerian telescope invented by Johannes Kepler consists of a convex objective lens with focal length fo and a convex eyepiece lens with focal length fewith f>fe.The two lenses are separated
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